keyword
https://read.qxmd.com/read/38465182/influence-of-implant-location-number-and-design-in-ischemic-zone-for-implant-prosthesis-success-rate-a-comparative-three-dimensional-finite-element-analysis
#1
JOURNAL ARTICLE
Arshad J Sayed, Kamlesh K Garg, Sasankoti R Mohan, Sabahat Ullah Khan Tareen, Bugude Shiva Shankar, Mostafa H Omran
BACKGROUND: The performance of an implant-supported prosthesis depends on the implant type, number, implant location, and prosthesis design which is directly associated with the distribution of the occlusal forces during mastication. The purpose of the present study is to analyze with three-dimensional (3D) finite element comparative analysis, the influence of implant location, number, and prosthesis design in the mandibular posterior region where multiple posterior teeth replacement is indicated, which in turn is associated with the longevity or Implant success rate...
February 2024: Curēus
https://read.qxmd.com/read/38415804/mechanical-stability-of-posterior-implant-supported-monolithic-zirconia-cantilever-on-titanium-base-abutments-an-in%C3%A2-vitro-study
#2
JOURNAL ARTICLE
Carme Riera, Duygu Karasan, Irena Sailer, Phillipe Mojon, Vincent Fehmer, João Pitta
PURPOSE: Investigate survival and technical complications of two-unit posterior implant-supported cantilever made of monolithic zirconia on titanium-base abutments (Zr-TiB) vs. porcelain-fused-to-metal on castable gold abutments (PFM-GA) using two different implant connections, internal butt-joint (IBJ) and internal conical (IC). MATERIALS AND METHODS: Forty-eight implants (4.3 mm diameter) were divided into four groups (n = 12) to support 2-unit mandibular premolar cantilevers with two different materials (Zr-TiB vs...
February 28, 2024: Clinical Oral Implants Research
https://read.qxmd.com/read/38406087/shielding-the-pier-abutment-using-a-nonrigid-connector
#3
Ekta M Kanojia, Anjali Bhoyar, Surekha R Dubey, Seema Sathe, Sheetal R Khubchandani, Rakhi Shinde
The attachment of a fixed partial denture (FPD) on a pier abutment may be necessary in some partially edentulous instances because of the pattern of lost teeth. Nonetheless, it has been noted that using a stiff FPD to restore two lost teeth and an intermediate pier abutment is not the best course of action. In this case, using a stiff connector concentrates the stresses on the pier abutment. In this situation, the pier abutment serves as a pivot, increasing the debonding of the fixed dental prosthesis and ultimately compromising the success of the FPD...
January 2024: Curēus
https://read.qxmd.com/read/38371000/progressive-strategy-for-congenitally-missing-anteriors-in-binder-syndrome-a-case-report
#4
Lovely Bharti, Sunita Shrivastav, Ranjit H Kamble, Aksha Bhargava
Binder syndrome (maxillonasal dysplasia) is an uncommon congenital craniofacial condition. It is marked by distinctive facial characteristics including a flat, vertically oriented nose, maxillary underdevelopment, malocclusion, and nasal bone irregularities. This case study introduces an inventive strategy for addressing congenitally absent anterior teeth in a patient diagnosed with Binder syndrome. Our treatment approach combined orthodontic interventions and prosthetic restorations to enhance both aesthetics and function...
January 2024: Curēus
https://read.qxmd.com/read/38367827/performance-evaluation-of-three-versions-of-a-convolutional-neural-network-for-object-detection-and-segmentation-using-a-multiclass-and-reduced-panoramic-radiograph-dataset
#5
JOURNAL ARTICLE
M Bonfanti-Gris, A Herrera, S Paraíso-Medina, R Alonso-Calvo, F Martínez-Rus, G Pradíes
OBJECTIVES: To evaluate the diagnostic performance of three versions of a deep-learning convolutional neural network in terms of object detection and segmentation using a multiclass panoramic radiograph dataset. METHODS: A total of 600 orthopantomographies were randomly selected for this study and manually annotated by a single operator using an image annotation tool (COCO Annotator v.11.0.1) to establish ground truth. The annotation classes included teeth, maxilla, mandible, inferior alveolar nerve, dento- and implant-supported crowns/pontics, endodontic treatment, resin-based restorations, metallic restorations, and implants...
February 15, 2024: Journal of Dentistry
https://read.qxmd.com/read/38354592/the-influence-of-climate-changes-on-heavy-metals-accumulation-in-alosa-immaculata-from-the-danube-river-basin
#6
JOURNAL ARTICLE
Nina-Nicoleta Lazăr, Ira-Adeline Simionov, Ștefan-Mihai Petrea, Cătălina Iticescu, Puiu-Lucian Georgescu, Floricel Dima, Alina Antache
This research report provides a comprehensive overview of the historical trends in heavy metal concentrations in the Pontic shad (Alosa immaculata) populations from both the Danube River and the Black Sea, while also exploring the potential influence of global warming on metal accumulation. Through bibliometric modeling analysis, it reveals significant limitations in existing international research, particularly the lack of comprehensive data on the impact of hydroclimatic changes on heavy metal accumulation in Alosa immaculata...
February 13, 2024: Marine Pollution Bulletin
https://read.qxmd.com/read/38348345/association-of-the-osseodensification-technique-with-soft-tissue-substitute-in-a-limitrophe-edentulous-area-a-clinical-case-report-with-5-year-follow-up
#7
André Luiz Berbel de Souza, Rogério Jorqueira Dos Reis, Rodrigo Mendes Ferreiro Girondo, Rafaela Pascon, Alexandre Cabrera, Gustavo Vargas da Silva Salomão
The osseodensification (OD) technique differs from conventional milling for dental implant installation in that it preserves the prepared bone and compacts it toward the apex and lateral walls of the socket, resulting in bone compaction. By enabling autografting, bone expansion, and high implant insertion torques, OD has become an increasingly popular option. The aim of this clinical case report is to demonstrate the predictability of combining OD with guided bone and tissue regeneration (GBR/GTR) techniques for bone expansion in the maxilla with reduced thickness, while avoiding other reconstructive surgeries...
2024: Case Reports in Dentistry
https://read.qxmd.com/read/38329841/the-use-of-splinted-vs-non-splinted-prosthetic-design-in-dental-implants-a-literature-review
#8
JOURNAL ARTICLE
Mohammed Aljuboori, Mohammed Jasim Al-Juboori, Mohammed Ahmed Al Attas, John Minichetti, Joseph Akhikar
Choosing between a splinted or non-splinted implant prosthesis should be based on solid scientific evidence that consider the condition and needs of each case. This review attempts to elaborate on the factors that directly influence the clinical decision between splinting or not splinting dental implants. An online and hand-search of the published literature was conducted to identify studies that examined splinted (SP) and non-splinted prostheses (NSP). The search terms that were used, alone or in combination, were "splinting prosthesis," "non splinting prosthesis," "prosthetic design," "stress distribution in dental implant," and "implant loading", "implant occlusion", "crestal bone resorption...
February 8, 2024: Journal of Oral Implantology
https://read.qxmd.com/read/38303871/effect-of-various-post-curing-light-intensities-times-and-energy-levels-on-the-color-of-3d-printed-resin-crowns
#9
JOURNAL ARTICLE
Citra Dewi Sahrir, Muhammad Ruslin, Sheng-Yang Lee, Wei-Chun Lin
BACKGROUND/PURPOSE: Current 3D-printing technology has been widely used for creating dental resin restorations. This study aimed to evaluate the effect of light intensity, time, and energy post-curing on the surface color of 3D-printed resin crowns. However, the influences of post-curing parameters on the restoration after printing still need to be explored. Therefore, this project investigates the effect of post-cure conditions on resin color. MATERIALS AND METHODS: Specimens from single-crown (SC) and pontic (PO) specimens underwent post-curing at various light intensities (105, 210, 420, 630, and 860 mW/cm2) for 5, 10, and 15 min...
January 2024: Journal of Dental Sciences
https://read.qxmd.com/read/38233257/biofilm-accumulation-on-complete-arch-subperiosteal-implant-supported-prostheses-effect-of-pontic-type
#10
JOURNAL ARTICLE
Pingyi Jia, Jingwen Yang
STATEMENT OF PROBLEM: Complete arch subperiosteal implant-supported prostheses present challenges in terms of effective cleaning, leading to the accumulation of biofilm on their intaglio surfaces. The association between different intaglio surface morphologies and biofilm accumulation on complete arch subperiosteal implant-supported prostheses is unclear. PURPOSE: The purpose of this in vitro study was to investigate the correlation between the intaglio surface of complete arch subperiosteal implant-supported prostheses and biofilm accumulation...
January 16, 2024: Journal of Prosthetic Dentistry
https://read.qxmd.com/read/38221600/initial-damage-and-failure-load-of-zirconia-ceramic-and-metal-ceramic-posterior-cantilever-fixed-partial-dentures
#11
JOURNAL ARTICLE
Wolfgang Bömicke, Philipp Boisserée, Peter Rammelsberg, Stefan Rues
OBJECTIVES: The aim of this study was to compare failure load and initial damage in monolithic, partially veneered, and completely veneered (translucent) zirconia cantilevered fixed partial dentures (CFPDs), as well as completely veneered metal-ceramic CFPDs under different support and loading configurations. MATERIALS AND METHODS: Eight test groups with anatomically congruent CFPDs (n = 8/group) were fabricated, differing in CFPD material/support structure/loading direction (load applied via steel ball (Ø 6 mm) 3 mm from the distal end of the pontic for axial loading with a 2-point contact on the inner cusp ridges of the buccal and oral cusps and 1...
January 15, 2024: Clinical Oral Investigations
https://read.qxmd.com/read/38200296/elevated-genetic-risk-for-multiple-sclerosis-emerged-in-steppe-pastoralist-populations
#12
JOURNAL ARTICLE
William Barrie, Yaoling Yang, Evan K Irving-Pease, Kathrine E Attfield, Gabriele Scorrano, Lise Torp Jensen, Angelos P Armen, Evangelos Antonios Dimopoulos, Aaron Stern, Alba Refoyo-Martinez, Alice Pearson, Abigail Ramsøe, Charleen Gaunitz, Fabrice Demeter, Marie Louise S Jørkov, Stig Bermann Møller, Bente Springborg, Lutz Klassen, Inger Marie Hyldgård, Niels Wickmann, Lasse Vinner, Thorfinn Sand Korneliussen, Morten E Allentoft, Martin Sikora, Kristian Kristiansen, Santiago Rodriguez, Rasmus Nielsen, Astrid K N Iversen, Daniel J Lawson, Lars Fugger, Eske Willerslev
Multiple sclerosis (MS) is a neuro-inflammatory and neurodegenerative disease that is most prevalent in Northern Europe. Although it is known that inherited risk for MS is located within or in close proximity to immune-related genes, it is unknown when, where and how this genetic risk originated1 . Here, by using a large ancient genome dataset from the Mesolithic period to the Bronze Age2 , along with new Medieval and post-Medieval genomes, we show that the genetic risk for MS rose among pastoralists from the Pontic steppe and was brought into Europe by the Yamnaya-related migration approximately 5,000 years ago...
January 2024: Nature
https://read.qxmd.com/read/38186222/perio-prosthodontic-pontic-site-management-part-ii-pontic-site-reconstruction-strategies-to-enhance-the-esthetic-and-biological-outcomes
#13
JOURNAL ARTICLE
Ramon Gomez Meda, Jonathan Esquivel
OBJECTIVE: Ridge deformities are present in most patients after tooth extraction; these defects make the management of future implant and pontic sites challenging to deal with. The restorative team should be able to diagnose and treat these deformities to allow for successful outcomes. Many approaches have been described to reconstruct pontic sites, each with specific indications. This article describes the different approaches to reconstructing pontic sites and their indications to allow for a proper esthetic and biological environment for future restorations...
January 7, 2024: Journal of Esthetic and Restorative Dentistry
https://read.qxmd.com/read/38159906/the-hat-trick-technique-a-modification-of-soft-tissue-grafting-using-volume-stable-collagen-matrix-and-cross-linked-hyaluronic-acid-part-a-the-pontic-site
#14
JOURNAL ARTICLE
Bachar Husseini, Anton Freidmann, Ralph Wak, Nabil Ghosn, Karim Senni, Sylvie Changotade, Georges Khoury, Ronald Younes
Vertical soft tissue augmentation between implants can be clinically challenging and burdensome for patients when employing conventional techniques. Recently, with the introduction of xenogenic collagen matrices, the principle of single-site surgery has become more common. However, some issues persist regarding graft stability and tissue integration. In the present technical note, the authors introduce the "HAT-TRICK" technique to address these observed difficulties. As the name suggests, this technique is believed to provide improved stability, volumetric gain, and histological integration of the implanted matrix by shaping it appropriately resembling a hat over the crest with apical bevels, stabilized with fixation pins and infused with cross-linked hyaluronic acid (xHya)...
December 28, 2023: Journal of Stomatology, Oral and Maxillofacial Surgery
https://read.qxmd.com/read/38123640/accurate-detection-of-identity-by-descent-segments-in-human-ancient-dna
#15
JOURNAL ARTICLE
Harald Ringbauer, Yilei Huang, Ali Akbari, Swapan Mallick, Iñigo Olalde, Nick Patterson, David Reich
Long DNA segments shared between two individuals, known as identity-by-descent (IBD), reveal recent genealogical connections. Here we introduce ancIBD, a method for identifying IBD segments in ancient human DNA (aDNA) using a hidden Markov model and imputed genotype probabilities. We demonstrate that ancIBD accurately identifies IBD segments >8 cM for aDNA data with an average depth of >0.25× for whole-genome sequencing or >1× for 1240k single nucleotide polymorphism capture data. Applying ancIBD to 4,248 ancient Eurasian individuals, we identify relatives up to the sixth degree and genealogical connections between archaeological groups...
December 20, 2023: Nature Genetics
https://read.qxmd.com/read/38118448/an-individual-with-sarmatian-related-ancestry-in-roman-britain
#16
JOURNAL ARTICLE
Marina Silva, Thomas Booth, Joanna Moore, Kyriaki Anastasiadou, Don Walker, Alexandre Gilardet, Christopher Barrington, Monica Kelly, Mia Williams, Michael Henderson, Alex Smith, David Bowsher, Janet Montgomery, Pontus Skoglund
In the second century CE the Roman Empire had increasing contact with Sarmatians, nomadic Iranian speakers occupying an area stretching from the Pontic-Caspian steppe to the Carpathian mountains, both in the Caucasus and in the Danubian borders of the empire.1 , 2 , 3 In 175 CE, following their defeat in the Marcomannic Wars, emperor Marcus Aurelius drafted Sarmatian cavalry into Roman legions and deployed 5,500 Sarmatian soldiers to Britain, as recorded by contemporary historian Cassius Dio.4 , 5 Little is known about where the Sarmatian cavalry were stationed, and no individuals connected with this historically attested event have been identified to date, leaving its impact on Britain largely unknown...
December 11, 2023: Current Biology: CB
https://read.qxmd.com/read/38065952/morpho-chemical-characterization-of-individual-ancient-starches-retrieved-on-ground-stone-tools-from-palaeolithic-sites-in-the-pontic-steppe
#17
JOURNAL ARTICLE
G Birarda, E Badetti, C Cagnato, G Sorrentino, I Pantyukhina, C Stani, S Dal Zilio, G Khlopachev, S Covalenco, T Obada, N Skakun, A Sinitsyn, V Terekhina, A Marcomini, C Lubritto, N Cefarin, L Vaccari, L Longo
Despite the extensive literature on the retrieval of digestible starches from archaeological contexts, there are still significant concerns regarding their genuine origin and durability. Here, we propose a multi-analytical strategy to identify the authenticity of ancient starches retrieved from macrolithic tools excavated at Upper Paleolithic sites in the Pontic steppe. This strategy integrates the morphological discrimination of starches through optical microscopy and scanning electron microscopy with single starch chemo-profiling using Fourier transform infrared imaging and microscopy...
December 7, 2023: Scientific Reports
https://read.qxmd.com/read/38032050/how-generalist-insect-herbivores-respond-to-alien-plants-the-case-of-aphis-fabae-myzus-persicae-rhododendron-ponticum
#18
JOURNAL ARTICLE
Ameline Arnaud, Denoirjean Thomas, Casati Marion, Dorland Jean, Decocq Guillaume
BACKGROUND: The enemy release hypothesis (ERH) predicts that alien plant species are unsuitable hosts for native phytophagous insects. On the other hand, the biotic resistance hypothesis (BRH) predicts that generalist herbivores may prefer alien plant over their common host plant. In this study, we have tested these two hypotheses by comparing the potential colonization of the invasive Pontic rhododendron (Rhododendron ponticum L.) vs. the common rearing host plants by two generalist aphid species (Aphis fabae and Myzus persicae)...
November 30, 2023: Pest Management Science
https://read.qxmd.com/read/38028055/chairside-posterior-cantilevered-fixed-partial-denture-case-report
#19
Lucien Dupagne, Vincent Fouquet, Jean-Pierre Attal
The cantilevered fixed partial denture (CFPD) is gaining recognition as a sound method of replacing missing teeth in the posterior sector. The purpose of this case report is to demonstrate that this type of restoration can be performed in a single appointment. A 39-year-old patient presented herself to the dental department; she showed agenesis of the two first maxillary premolars with a totally closed mesio-distal gap and a recent loss of the 2 s maxillary premolars. This case report concerns the replacement of the upper left second premolar...
November 2023: Clinical Case Reports
https://read.qxmd.com/read/37981045/long-term-clinical-outcome-of-three-unit-fixed-fixed-posterior-zirconia-ceramic-inlay-retained-fdps-with-a-modified-design
#20
JOURNAL ARTICLE
M Sad Chaar, Nicole Passia, Merlind Becker, Matthias Kern
OBJECTIVES: To assess the long-term clinical outcome of posterior inlay-retained fixed dental prostheses (IRFDPs) with a modified design made from zirconia ceramic. METHODS: In 30 patients thirty 3-unit IRFDPs were placed to replace 7 premolars (4 in the maxilla, 3 in the mandible), and 23 first molars (15 in the maxilla, 8 in the mandible). Preparations were accomplished in agreement with the general principles for ceramic inlay restorations and modified with a short retainer-wing bevel preparation within the enamel at the buccal and oral sides...
January 2024: Journal of Dentistry
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